split nut

Preloaded split nuts and double nuts are available to eliminate backlash.

It can also compensate for nut wear using a split nut, much like the Acme thread form.

Split nuts work best with trapezoidal threads.

A split nut assembly is often used in positioning systems, for example in the leadscrew of a lathe.

For square threads, the nut must be replaced; for trapezoidal threads, a split nut may be used to compensate for the wear.

(e) Acme thread - With its 30 thread angle this has higher friction than the square thread, but is easier to manufacture and can be used with a split nut to adjust for wear.

A split nut is a nut that is split lengthwise into two pieces (opposed halves) so that its female thread may be opened and closed over the male thread of a bolt or leadscrew.

The next step up from the simple nut is a split nut, whose halves can be adjusted and locked with screws so that one side rides leftward thread faces, and the other side rides rightward faces.